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    Trump: Cruz is a 'nasty guy'

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Trump: Cruz is a 'nasty guy'

With only weeks before the first votes of the 2016 race for the White House are cast in Iowa, Republican front-runners Donald Trump and Ted Cruz continue to trade insults. CNN's Dana Bash reports.

Trump: Cruz is a 'nasty guy'

With only weeks before the first votes of the 2016 race for the White House are cast in Iowa, Republican front-runners Donald Trump and Ted Cruz continue to trade insults. CNN's Dana Bash reports.